Question: What is the name of a dwarf planet that starts with the letter p.
Paraphrase: What is the title of a predominate planet that begins with the letter p.
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q2199 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'p')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: Pluto, Pluto